Atenolol is a medication that belongs to a class of drugs called beta-blockers. It is primarily used to treat high blood pressure and chest pain (angina). By blocking certain receptors in the heart, atenolol helps to lower heart rate and reduce the workload on the heart, making it easier for the heart to pump blood. In addition to managing hypertension and angina, atenolol may also be prescribed for other conditions, such as arrhythmias and to prevent migraines. It is usually taken orally in tablet form and should be used under the guidance of a healthcare professional to ensure safety and effectiveness.